BELL covered grating is ideal for new constructions and replacements for duct covers but is also well suited for refurbishment applications to replace old&comma; heavy & cumbersome traditional flooring materials and covers&period; The characteristics of BELL covered gratings make it more favourable for duct covers rather than using steel&comma; timber or concrete systems due to its lower weight&comma; anti-slip surface&comma; ease of installation and absence of maintenance&period;